/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */

import {addDefaultField} from '../../../field/validation';
import {FieldPathNode} from '../../../schema/path_node';
import {assertPathIsCurrent} from '../../../schema/schema';
import type {FieldContext, PathKind, SchemaPath, SchemaPathRules, TreeValidator} from '../../types';

/**
 * Adds logic to a field to determine if the field or any of its child fields has validation errors.
 *
 * @param path The target path to add the validation logic to.
 * @param logic A `TreeValidator` that returns the current validation errors.
 *   Errors returned by the validator may specify a target field to indicate an error on a child field.
 * @template TValue The type of value stored in the field the logic is bound to.
 * @template TPathKind The kind of path the logic is bound to (a root path, child path, or item of an array)
 *
 * @category logic
 * @experimental 21.0.0
 */
export function validateTree<TValue, TPathKind extends PathKind = PathKind.Root>(
  path: SchemaPath<TValue, SchemaPathRules.Supported, TPathKind>,
  logic: NoInfer<TreeValidator<TValue, TPathKind>>,
): void {
  assertPathIsCurrent(path);

  const pathNode = FieldPathNode.unwrapFieldPath(path);
  pathNode.builder.addSyncTreeErrorRule((ctx) =>
    addDefaultField(logic(ctx as FieldContext<TValue, TPathKind>), ctx.field),
  );
}
